/*

 * Copyright (c) 2005, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <assert.h>

#include <dlfcn.h>

#include <winscard.h>

#include "sun_security_smartcardio_PlatformPCSC.h"

#include "pcsc_md.h"

void *hModule;

FPTR_SCardEstablishContext scardEstablishContext;

FPTR_SCardConnect scardConnect;

FPTR_SCardDisconnect scardDisconnect;

FPTR_SCardStatus scardStatus;

FPTR_SCardGetStatusChange scardGetStatusChange;

FPTR_SCardTransmit scardTransmit;

FPTR_SCardListReaders scardListReaders;

FPTR_SCardBeginTransaction scardBeginTransaction;

FPTR_SCardEndTransaction scardEndTransaction;

FPTR_SCardControl scardControl;

/*

 * Throws a Java Exception by name

 */

void throwByName(JNIEnv *env, const char *name, const char *msg)

{

    jclass cls = (*env)->FindClass(env, name);

    if (cls != 0) /* Otherwise an exception has already been thrown */

        (*env)->ThrowNew(env, cls, msg);

}

/*

 * Throws java.lang.NullPointerException

 */

void throwNullPointerException(JNIEnv *env, const char *msg)

{

    throwByName(env, "java/lang/NullPointerException", msg);

}

/*

 * Throws java.io.IOException

 */

void throwIOException(JNIEnv *env, const char *msg)

{

    throwByName(env, "java/io/IOException", msg);

}

void *findFunction(JNIEnv *env, void *hModule, char *functionName) {

    void *fAddress = dlsym(hModule, functionName);

    if (fAddress == NULL) {

        char errorMessage[256];

        snprintf(errorMessage, sizeof(errorMessage), "Symbol not found: %s", functionName);

        throwNullPointerException(env, errorMessage);

        return NULL;

    }

    return fAddress;

}

JNIEXPORT void JNICALL Java_sun_security_smartcardio_PlatformPCSC_initialize

        (JNIEnv *env, jclass thisClass, jstring jLibName) {

    const char *libName = (*env)->GetStringUTFChars(env, jLibName, NULL);

    if (libName == NULL) {

        throwNullPointerException(env, "PCSC library name is null");

        return;

    }

    hModule = dlopen(libName, RTLD_LAZY);

    (*env)->ReleaseStringUTFChars(env, jLibName, libName);

    if (hModule == NULL) {

        throwIOException(env, dlerror());

        return;

    }

    scardEstablishContext = (FPTR_SCardEstablishContext)findFunction(env, hModule, "SCardEstablishContext");

    if ((*env)->ExceptionCheck(env)) {

         return;

    }

    scardConnect          = (FPTR_SCardConnect)         findFunction(env, hModule, "SCardConnect");

    if ((*env)->ExceptionCheck(env)) {

         return;

    }

    scardDisconnect       = (FPTR_SCardDisconnect)      findFunction(env, hModule, "SCardDisconnect");

    if ((*env)->ExceptionCheck(env)) {

         return;

    }

    scardStatus           = (FPTR_SCardStatus)          findFunction(env, hModule, "SCardStatus");

    if ((*env)->ExceptionCheck(env)) {

         return;

    }

    scardGetStatusChange  = (FPTR_SCardGetStatusChange) findFunction(env, hModule, "SCardGetStatusChange");

    if ((*env)->ExceptionCheck(env)) {

         return;

    }

    scardTransmit         = (FPTR_SCardTransmit)        findFunction(env, hModule, "SCardTransmit");

    if ((*env)->ExceptionCheck(env)) {

         return;

    }

    scardListReaders      = (FPTR_SCardListReaders)     findFunction(env, hModule, "SCardListReaders");

    if ((*env)->ExceptionCheck(env)) {

         return;

    }

    scardBeginTransaction = (FPTR_SCardBeginTransaction)findFunction(env, hModule, "SCardBeginTransaction");

    if ((*env)->ExceptionCheck(env)) {

         return;

    }

    scardEndTransaction   = (FPTR_SCardEndTransaction)  findFunction(env, hModule, "SCardEndTransaction");

    if ((*env)->ExceptionCheck(env)) {

         return;

    }

    scardControl          = (FPTR_SCardControl)         findFunction(env, hModule, "SCardControl");

}